package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    /*
     * 新增菜品及其对应的口味
     * */
    @Override
    @Transactional
    public void saveWithFlare(DishDTO dishDTO) {

        Dish dish=new Dish();

        BeanUtils.copyProperties(dishDTO,dish);

        //向菜品表里插入1条数据
        dishMapper.insert(dish);
        //获取insert语句生产的主键值
        Long dishId = dish.getId();



        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味表里插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }

    }


    /*
     * 菜品分页查询
     * */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        //开始分页查询
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());

        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }


    /*
     * 菜品批量删除
     * */
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断菜品是否能被删除--菜品是否在启售中
        for (Long id : ids) {
         Dish dish= dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE){
                //当前菜品处于启售中，不允许删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //判断菜品是否能被删除--菜品是否被包含在套餐中
        List<Long> setmealIdsDishIds = setmealDishMapper.getSetmealIdsDishIds(ids);
        if(setmealIdsDishIds!=null&&setmealIdsDishIds.size()>0){
            //当前菜品已被套餐关联，不允许删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }


        //删除菜品表里的菜品数据
        /*for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }*/

        //根据菜品id集合批量删除菜品数据
        dishMapper.deleteByIds(ids);

        //根据菜品id集合批量删除关联的口味数据
        dishFlavorMapper.deleteByDishIds(ids);






    }

    /*
    * 根据id查询菜品(包括口味)
    * */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);

        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors=dishFlavorMapper.getByDishId(id);


        //将查询到的数据封装到DishVO
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);



        return dishVO;
    }

    /*
    * 修改菜品基本信息和口味
    * */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        //修改菜品基本信息
        dishMapper.update(dish);

        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        //插入新编写好的口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表里插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /*
    * 启售禁售菜品
    * */
    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish=Dish.builder().status(status).id(id).build();

        dishMapper.update(dish);

        //如果是停售，则需要停售对应的套餐
        if(status==StatusConstant.DISABLE){
            List<Long> dishIds=new ArrayList<>();
            dishIds.add(id);
            //查询对应的套餐id
            List<Long> setmealIdsDishIds = setmealDishMapper.getSetmealIdsDishIds(dishIds);
            if(setmealIdsDishIds!=null&&setmealIdsDishIds.size()>0){
                //存在对应的套餐id，应停售
                for (Long setmealIdsDishId : setmealIdsDishIds) {
                    Setmeal setmeal=Setmeal.builder().status(StatusConstant.DISABLE).id(setmealIdsDishId).build();
                    setmealMapper.update(setmeal);
                }
            }

        }


    }


    /*
     *
     *根据分类id查询菜品
     * */
    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish=Dish.builder().categoryId(categoryId).status(StatusConstant.ENABLE).build();

        List<Dish> list=dishMapper.list(dish);
      return list;
    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
